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ADU Builders in Upland, CA

27 builders · ranked by Google rating and review volume · 15 CSLB license verified

★ Featured ADU builder

Featured ADU builder — this spot is open

Put your ADU company at the top of this page, in front of Upland homeowners who are comparing builders right now. Includes your logo, project photos, a direct call button and a link to your website.

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Upland is home to about 79,040 people (2020 Census) in San Bernardino County. We found 27 ADU builders and contractors that show up for Upland homeowners on Google Maps, 9 of them based in the city itself. Their average Google rating is 4.8 stars. 6 market themselves specifically as ADU builders, and 1 mention garage conversions. 15 have a matched, active CSLB license shown with a verified badge. The top-rated by our review-weighted score are JNC Construction, Skilled Home Builders and Hostetler Construction Inc..

Lots across San Bernardino County are often larger and land costs lower, which makes detached and prefab ADUs attractive. Foothill and mountain areas can face wildfire-zone construction requirements.

#1

JNC Construction

5.0 (143 Google reviews)

9360 Base Line Rd Ste H, Rancho Cucamonga, CA 91701

Serves Upland · based in Rancho Cucamonga
Remodels & additionsHome builderGeneral contractor
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#5

St Paul Contracting

5.0 (25 Google reviews)
✔ CSLB License Verified #1104071

9650 Business Center Dr Bldg 17, Suite 131, Rancho Cucamonga, CA 91730

Serves Upland · based in Rancho Cucamonga
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#8

Lopez United Inc

5.0 (14 Google reviews)
✔ CSLB License Verified #841932

11991 Silicon Ave, Chino, CA 91710

Serves Upland · based in Chino
Remodels & additionsHome builderGeneral contractor
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#20

OSHI Construction Inc.

5.0 (2 Google reviews)
✔ CSLB License Verified #990408

10722 Arrow Route Ste 304, Rancho Cucamonga, CA 91730

Serves Upland · based in Rancho Cucamonga
Remodels & additionsHome builderGeneral contractor
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#23

BCM Group Inc

4.0 (4 Google reviews)
✔ CSLB License Verified #968356

9339 Feron Blvd, Rancho Cucamonga, CA 91730

Serves Upland · based in Rancho Cucamonga
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#24

Home Masters Int'l

3.9 (38 Google reviews)
✔ CSLB License Verified #1009476

9038 Hellman Ave, Rancho Cucamonga, CA 91730

Serves Upland · based in Rancho Cucamonga
Remodels & additionsHome builderGeneral contractor
CallWebsiteView profile

Permits and pre-approved plans in Upland

ADU permits in Upland go through the city's building or planning department. Under AB 1332, every California city and county had to set up a pre-approved ADU plan program by January 1, 2025, so ask Upland whether it has approved plans you can use. See our pre-approved plans guide and California ADU law summary.

Planning an ADU in Upland? Start here

Prefab and Modular ADUs in California: Real Costs, Permits and PitfallsHow Long Does It Take to Build an ADU in Southern California?How Much Does It Cost to Build an ADU in Southern California?ADU Rental Income and Property Taxes in California: What to Expect

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Upland ADU FAQ

How many ADU builders serve Upland?

Our directory lists 27 ADU builders and contractors that appear for Upland on Google Maps, including companies based in nearby San Bernardino County communities.

Do I need a permit to build an ADU in Upland?

Yes. ADUs need a building permit from the City of Upland, which must approve or deny a complete application within 60 days under state law. Many cities also offer pre-approved plans that speed up review.

How much does an ADU cost in Upland?

Most Southern California detached ADUs land around $350 to $550 per square foot all-in, garage conversions around $200 to $350, and JADUs around $50,000 to $150,000. Use our ADU cost estimator and get three itemized bids.

How are Upland ADU builders ranked here?

By Google rating weighted by the number of reviews, so a 4.9 with 200 reviews ranks above a 5.0 with 3. Featured placements are clearly labeled and don't affect the organic ranking.

Nearby cities in San Bernardino County

San Bernardino 51Fontana 83Ontario 54Rancho Cucamonga 31Victorville 16Rialto 56Hesperia 18Chino 49Chino Hills 117Apple Valley 17Redlands 20Highland 8
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